Peptide-Assisted 2-D Assembly toward Free-Floating Ultrathin Platinum Nanoplates as Effective Electrocatalysts

Enbo Zhu; Xucheng Yan; Shiyi Wang; Mingjie Xu; Chen Wang; Haotian Liu; Jin Huang; Wang Xue; Jin Cai; Hendrik Heinz; Yujing Li; Yu Huang

doi:10.1021/acs.nanolett.9b00867

Peptide-Assisted 2-D Assembly toward Free-Floating Ultrathin Platinum Nanoplates as Effective Electrocatalysts

Enbo Zhu, Xucheng Yan, Shiyi Wang, Mingjie Xu, Chen Wang, Haotian Liu, Jin Huang, Wang Xue, Jin Cai, Hendrik Heinz, Yujing Li^*, Yu Huang

^*Corresponding author for this work

School of Material Science and Engineering

Research output: Contribution to journal › Article › peer-review

54 Citations (Scopus)

Abstract

We demonstrate the 2-D anisotropic formation of ultrathin free-floating Pt nanoplates from the assembly of small nanocrystals using T7 peptide (Ac-TLTTLTN-CONH₂). As-formed nanoplates are rich in grain boundaries that can promote their catalytic activities. Furthermore, we demonstrate that a minor number of Pd atoms can selectively deposit on and stabilize the grain boundaries, which leads to enhanced structure stability. The Pd-enhanced Pt polycrystal nanoplates show great oxygen reduction reaction activities with 15.5 times higher specific activity and 13.7 times higher mass activity than current state-of-the-art commercial Pt/C electrocatalysts as well as 2.5 times higher mass activity for hydrogen evolution reaction compared with Pt/C.

Original language	English
Pages (from-to)	3730-3736
Number of pages	7
Journal	Nano Letters
Volume	19
Issue number	6
DOIs	https://doi.org/10.1021/acs.nanolett.9b00867
Publication status	Published - 12 Jun 2019

Keywords

2-D assembly
Ultrathin platinum nanoplates
electrocatalyst
peptide

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10.1021/acs.nanolett.9b00867

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Zhu, E., Yan, X., Wang, S., Xu, M., Wang, C., Liu, H., Huang, J., Xue, W., Cai, J., Heinz, H., Li, Y., & Huang, Y. (2019). Peptide-Assisted 2-D Assembly toward Free-Floating Ultrathin Platinum Nanoplates as Effective Electrocatalysts. Nano Letters, 19(6), 3730-3736. https://doi.org/10.1021/acs.nanolett.9b00867

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title = "Peptide-Assisted 2-D Assembly toward Free-Floating Ultrathin Platinum Nanoplates as Effective Electrocatalysts",

abstract = "We demonstrate the 2-D anisotropic formation of ultrathin free-floating Pt nanoplates from the assembly of small nanocrystals using T7 peptide (Ac-TLTTLTN-CONH2). As-formed nanoplates are rich in grain boundaries that can promote their catalytic activities. Furthermore, we demonstrate that a minor number of Pd atoms can selectively deposit on and stabilize the grain boundaries, which leads to enhanced structure stability. The Pd-enhanced Pt polycrystal nanoplates show great oxygen reduction reaction activities with 15.5 times higher specific activity and 13.7 times higher mass activity than current state-of-the-art commercial Pt/C electrocatalysts as well as 2.5 times higher mass activity for hydrogen evolution reaction compared with Pt/C.",

keywords = "2-D assembly, Ultrathin platinum nanoplates, electrocatalyst, peptide",

author = "Enbo Zhu and Xucheng Yan and Shiyi Wang and Mingjie Xu and Chen Wang and Haotian Liu and Jin Huang and Wang Xue and Jin Cai and Hendrik Heinz and Yujing Li and Yu Huang",

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year = "2019",

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doi = "10.1021/acs.nanolett.9b00867",

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T1 - Peptide-Assisted 2-D Assembly toward Free-Floating Ultrathin Platinum Nanoplates as Effective Electrocatalysts

AU - Zhu, Enbo

AU - Yan, Xucheng

AU - Wang, Shiyi

AU - Xu, Mingjie

AU - Wang, Chen

AU - Liu, Haotian

AU - Huang, Jin

AU - Xue, Wang

AU - Cai, Jin

AU - Heinz, Hendrik

AU - Li, Yujing

AU - Huang, Yu

PY - 2019/6/12

Y1 - 2019/6/12

N2 - We demonstrate the 2-D anisotropic formation of ultrathin free-floating Pt nanoplates from the assembly of small nanocrystals using T7 peptide (Ac-TLTTLTN-CONH2). As-formed nanoplates are rich in grain boundaries that can promote their catalytic activities. Furthermore, we demonstrate that a minor number of Pd atoms can selectively deposit on and stabilize the grain boundaries, which leads to enhanced structure stability. The Pd-enhanced Pt polycrystal nanoplates show great oxygen reduction reaction activities with 15.5 times higher specific activity and 13.7 times higher mass activity than current state-of-the-art commercial Pt/C electrocatalysts as well as 2.5 times higher mass activity for hydrogen evolution reaction compared with Pt/C.

AB - We demonstrate the 2-D anisotropic formation of ultrathin free-floating Pt nanoplates from the assembly of small nanocrystals using T7 peptide (Ac-TLTTLTN-CONH2). As-formed nanoplates are rich in grain boundaries that can promote their catalytic activities. Furthermore, we demonstrate that a minor number of Pd atoms can selectively deposit on and stabilize the grain boundaries, which leads to enhanced structure stability. The Pd-enhanced Pt polycrystal nanoplates show great oxygen reduction reaction activities with 15.5 times higher specific activity and 13.7 times higher mass activity than current state-of-the-art commercial Pt/C electrocatalysts as well as 2.5 times higher mass activity for hydrogen evolution reaction compared with Pt/C.

KW - 2-D assembly

KW - Ultrathin platinum nanoplates

KW - electrocatalyst

KW - peptide

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DO - 10.1021/acs.nanolett.9b00867

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SN - 1530-6984

VL - 19

SP - 3730

EP - 3736

JO - Nano Letters

JF - Nano Letters

IS - 6

ER -

Peptide-Assisted 2-D Assembly toward Free-Floating Ultrathin Platinum Nanoplates as Effective Electrocatalysts

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Keywords

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